Would you rather bugs and exploits be HIDDEN until release? "Security through obscurity" doesn't work. Cheaters will be using these things to ruin the game once it comes out and Pandemic will be very slow (given their past track record) to release patches to fix them, if they ever do.

Best to get these things out on the table and do as much damage as possible while it's still in beta. What's the point of a beta if not to expose problems?

If we don't do this, we'll have only ourselves to blame when the cheaters start ruining your games in November!

So do everything you can exploit the beta and spread the word. This will allow Pandemic to actually make fixes early on.